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J. B. ROBINSON.

DEVICE FOR SPIRALING METAL.

No. 316,295.- Patented Apr. 21, 1885.

ll a ilmrnn STATES PATENT. Orrren.

JAMES B. ROBINSON, OF NEW YORK, N. Y.

DEVICE FOR SPIRALIN'G NlETAL.

fiPECIFICATION forming part of Letters Patent No. 316,295, dated April 21, 1885.

Application filed August 25, 1884.

To all whom it may concern:

Be it known that I, JAMES B. RoBINsoN, a citizen of the United States,resid-in gin the city, county, and State of New York, have invented a new and useful Improvement in Spiraling Metal, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 represents a side elevation of a tool or implement for spiraling metal embodying my invention. Fig. 2 is a top or plan View thereof, including a mandrel employed.

"Fig. 3 is a face view of one of the dies and part of the jaw with which it is connected. Fig. 4 is a front view of Fig. 3.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of means for spiraling metal or producing metal in spiral form.

Referring to the drawings, A represents a mandrel which is properly mounted and rotated in any desirable manner, said mandrel having a spiral face or thread.

B B represent two dies, each of which is connected with a jaw, 0, said dies having their working faces a grooved of the contour of a portion of the thread of the mandrel, so that when one end of the piece of metal to be (No model.)

spiraled is placed on the mandrel at the beginning of the thread, and the dies are placed on said end of the metal, and the jaws are closed so that the dies clamp the metal, when the mandrel is rotated the metal is carried along with the rotating mandrel and wound and drawn over the thread of the same, thus having a spiral shape imparted to it, the metal being also bent or'rounded in cross'section suitable for jewelers and others.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an apparatus for spiraling metal, the clamping-jaws 0, provided with dies B B, in combination with the mandrel A, having a spiral thread, the said mandrel rotating in grooves formed in the said dies, substantially as and for the purpose set forth.

2. In an apparatus of the order stated, the dies B, secured to clamping-jaws, and having grooves within which a spiral mandrel and the metal thereon are rotated, substantially as and for the purpose set forth.

' JAMES B. ROBINSON. Witnesses:

FRED DEBOLD, JAMES DETERMANN. 

